Back-spacer for dictaphones.



` T( H. MACDONALD. BACK SPAGER.l FOR DICTAPHONES.

APPLICATION FILED AUG, 29, 1911.

Lggmmmn Patented June 25,1912.

2 SHEETS-SHEET 1.

l "Ilm T. H.MAGDONALD.

BACK SPACER POR DIGTAPHONES, APPLICATION FILED AUG. 29, 19H.

Ftented Jun@ v25, 1912.

2 SlIEETSn-SHEET 2.

tiNITED STATES PATENT oFFroE.

THOMAS Hf. MCDDNALD. OF' BRIDGEPORT, CONNECTICUT, ASSIGNOBTO AMERICANGRAPHOPHON# COMPANY, 0F BRIDGEPORT, CQNNEGTICUT, A CORPORATION 0FBACK-SPACER FOR DICTAPHOES.

Specification of Letters Patent.

Applicationlled ugust 29, 1911. Serial 1Io.'64,719.A

To all whom'it may concern: i

Be it known that I, THOMAS H. M AonONALD, of Bridgeport', Connecticut,have invented a new -and useful Improvement in Back-4 Spacers forDictaphones, which invention is fully set forth in the followingspecifica tion. i

This invention relates to dictaphones, or that. class, of talkingmachines designed for taking dictation which is subsequentlytranscribed, and more particularly to the reproducing portion or elementof the mach1ne.` i

ln machines of this character, it is desirable for the operator who istranscribing the recordto repeat certain portions of the record, thatis, to place the reprodueer back fora short distance, in order that thelast portion 'of the record reproducedmay be repeated.

The particular object of the present invention is to provide a vsimpleand etlicient means for throwing there rodueeiback for a short distanceover t e record; in other words, to hack space the reproducer .tor thepurpose of securing the repetition of the part of the record that hasjust been reproduced.

W th thisobject in view, the invention consists in the construction,combination andarrangement of elements hereinafter more ytallydescribed,` and then pointed out in the claims.

The inventive idea is capable of receiving a variety ot mechanicalexpressions, one of which` for the purpose ot illustrating theinvention, shown in the accompanying drawings, in which- Figurey 1 is anend elevation of a machine, with parts shown in section, taken on line2-2. Fig. 2. Fig. 2 is ay broken plan view thereof: Figs. 3 and 4 arebroken' details ot portions of the larok-spacing device.

Referring to the drawings, in which like reference numerals indicatelike parts, 1 indicates the record carried on a suitable mandrel, andrevolved hy a suitable motor mounted in the framework of the machine, inthe usual manner. 2 indicates the reprodncer mounted on the usual or anysuitable carriage. traveling on the slide. rod 3 longitudinally past therecord, beingr propelled 'oy means of the iced nut Ll engaging the feedscrew 5, which is propelled by the "huh or sleeve 13.

motor of the machine. The carriage isrproratenteaJune 25, 1912.'

vided with the usual sleeve 6 embracing the slide rod 3, and with adownwardly dependmggu'ide arm 7 embracing the guide rod 8. All ofthe'parts thus describedare of the usual or any suitable construction,'and do vnot form any specific part of the present invention, andtherefore need notbe more `fully described.

hub 13, having an outwardly projecting`` arm or lever 14, which isprovided on its end with a button 15 to fit the finger of the operator.1n a recess on the left hand end of the hub or sleeve 13 is acoiledspring 16, reacting between an abutment- 17 on the hub or sleeve13 and the squared end ot a pin 18 projectin from the1collar 10 (seeFig. 2). The hu4 or sleeve 13 is provided with a cut-out portion or slot19, into which projects the end of a lever 20 ri 'idly secured to the.feed nut shaft 21, which shaft is mounted to turn in suitable bearingsin the frame. the shaft being squared to fit a square hole in the feednut. as shown, in order to insure a positive motion or turning of thefeed nut with the shaft.

Pivoted on a stud 22 on the sleeve or hub 13is a pawl 23. to which issecured one end of a coiled spring 24, the other end of said springbeing secured to u part of the The 'turning movement of the vpawl 23 islimited in one direction by the stop pin 25 engagingr a. shoulder on thesleeve or hub 13.

Mounted on the framework of the machine is a ratchet rack 2G, inposition .to be engaged by the nose of the..pawl23 when vthe operatinglever, 14 is depressetl against thetcnsion oi the spring 16.. `Ascrew 27ment. of thelever '20 in the slot or. opening I, 19 of the 'sleeve' 13,the feed nut shaft r21 spturneii, thereby lifting the feednutgt ofioizthe feed screw v 5 against' the tension -of spring 29, and et theseme time causing thenpvverdly projecting arm 30 ofv the feed nut toengage the leverA arm 31 on lthe re,- prodiicermand .liftit so Vas toremovethe i stylus point from Contactl with the record.

'The seme, downward depression of the but-- ton 15,-withftlie'consequentturning of the hubv or sleeve ,'13, brings the-pawiz3-into 'engagementwitb the ratchet rucir, and the 'continuedgtnriingmovement of the hub' or sleeve '113 censs the pewl to ect .in the natureof e toggle, thereby foroing'hub or s'leeve'fl-l, and 'with itthe.carriage of tile machine, from right to left, es 'shown 1n frfullcnd dotted lines in Fig. l3, 'that is, for

i inch, thereby giving the reproducer point a'siight distance,preferably about l/BQ .of

the set-back desired to secure Athe proper repetition. .l If desired,the depressing oction on' the button 15 may be-repeated sevf eralVtinieto set the4 carriage back still vfarther." The turning movement ofthe sleeve or' hub 13 onthe carriage sleeve Gis limited by theengagement of-the'screvvpin 27 inz'tiie slot 2,8,j-vvhile the 'pawl 23is always retained in 'its proper position 'by theto'rsion spring24,"Wliieh holds the -stop pin against the shoulder on the liub orslee'vel. r

What is claimed isz- 1.111 a. talking machine, the combination offareproducer, a carrie-ge therefor, a track or wey for seid carriage, eVsleeve-onsaid carriage, ev coller on seidl sleeve, a hub mounted to turnon said sleeve and projectin intoseid collar,elever attached tosaid 'huto .actuate the` same, e toggle-pcwl on seid hub, and o. rack on thefreine of the .machine oin position to be engaged by said pawl the hubisV turned by the lever. it. ingle teilnng machine, che combination of e,oe'rriage wey, a reproducer-cm'riage .moving on sind wey, e cerriegepropelling nut and screw, a coller mounted on said' carriage, ajliubmountedv to turn on'seid carriage and projecting into seidv collar, it

lever for turning the hub in one direction, e f

` spring for turning said hub in the other di rection, a Vstop limitingthe turning movement of the hub, e.- rack on said machine lever".

and a. puwl on lseid hubj enggingigusaidf-"rackv' when turned in onedirectionu only.

3. In a talking (machine, thecombinetion of e reproducer, a carriage,therefor, @track or way for said earring@a'sleevejon` seid carriage, a.collar 4ixedly `mounted on said sleeve, a mounted to turn on said sleeveA and proJectin 4interposeden reacting betweensaid collar into seideolien, a. spring lend hub, e. iever 'attached to said hubto operate thesame, e. toggle-pawl on said hub, and a rack on the frame of ,themachine in position to' be englged b seid pewl when the hub is turned ythe ever.

4. In le-'uilking machine, vthe Combination of a reproducer, a 'carriagetherefor, a track or wey for' seid carriage, a Sleeve on said carriage,a coller fixedlymountedon said sleeve, a. hub 'mounted to turn onea'i'dsleeve and projecting' intos'aid collar, e compres# sion springinterposed and reactingv between seid coller and hub, a leverattac'hedto, .sa,id`

hub to operate the seme, a togglepavrion said hub, Ineens forllimitingthe movement' of seid paw1,'and a rack on the frameof'., the fImichinein "'stionio beengeged by seid -pewl Wll'e'n tliehnb .isf turned by the5,111; a. talking machine, the combination of a reproducer, e carriagetherefor, a track or Way for seid carriage, a eedscrew, e" ysleeve on'said carriage, a hub mounted to turn on seid sleeve and provided witheslot, a lever attached to said hub to o erate the same, a toggie-pawlIon said hu a rack onthe frame of the machine in'position'to be engagedby seid pawl' when the hub is t`1'1rned by the lever, an armengagin'gthereproducer atone end and the feed screw it the other, e pivot forseid arm, e lever.

